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Primary Meanings of transitivity. n (logic and mathematics) a relation between three elements such that if it holds between the first and second and it also holds between the second and third it must necessarily hold between the first and third.
Selectivity in analytical chemistry. (IUPAC Recommendations 2001) Abstract: The correct use of the term âselectivityâ and its clear distinction from the. term âspecificityâ are discussed. A definition of selectivity is given, and it is rec-. ommended that the use of this term be promoted and that the use of the term. âspecificityâ be discouraged. 1. INTRODUCTION. A very important quality criterion of an analytical method is its capability to deliver signals that are free.